proceedings: biological society 259 



upon the restoration of the dinosaur Podokesaurus holyokensis of Talbot, 

 which took place in the autumn of 1915. This discussion was carried 

 on in correspondence and participated in by Dr. Richard S. Lull, 

 Dr. Mignon Talbot, Dr. Gerhard Heilmann, and the speaker. Lan- 

 tern slide illustration and blackboard demonstration were employed to 

 point out what were held to be inconsistencies in the restoration of this 

 animal, as figured in Dr. Lull's Triassic Life of the Connecticut Valley 

 (fig. 31). Lull and Talbot contend that the pubic element in the 

 matrix of Podokesaurus holyokensis occupies the position in relation to 

 the other bones of the skeleton that obtained in life. Shufeldt and 

 Heilman controvert this decision by pointing out that all the bones in 

 the slab containing the remains of this dinosaur are far removed from 

 their normal articulations and that if the pubic element were articulated 

 as Lull has figured it, it would have come, in life, forcibly in contact, 

 anteriorly, with the sternal ribs and been a constant menace to the 

 abdominal viscera in various movements of the animal. 



R. E. Coker: A biological and fish cultural experiment station (Illus- 

 trated by lantern slides). Mr. Coker said that since biologists, at least, 

 are generally familiar with the functions of the Fairport Biological Sta- 

 tion in the propagation and study of the fresh-water mussels, particular 

 attention would be given to the purposes of that station in experimental 

 work relating to the rearing of fishes. As in horticulture the problems 

 of the nurseryman and those of the fruit grower are distinct, so in fish- 

 culture and in fish-culture experimental work there is the phase of the 

 hatchery, with its product of fry and fingerling, and that of the fish 

 farm where it is intended to rear fish to adult size in commerical quan- 

 tities. The Fairport station is concerned with problems of rearing 

 rather than of hatching. The grower of fish has problems similar to 

 those of the stock farmer or the poultry raiser, while in addition he 

 must take thought of conditions affecting the respiration of fish. He 

 cannot always regulate the numbers of fishes in his ponds by direct 

 means, but may have to accomplish this end by proper association of 

 species. It may even be necessary to group together species which 

 are to an extent "incompatible." The problem of the fish pond has 

 its mechanical, physical, chemical, and zoological aspects; more espe- 

 cially, however, it is a problem of appropriate vegetation, promotion 

 of food supply, and proper association of species of fish. 



Following the adjournment of the Society several members examined 

 a microscopic preparation of a living embryo of Filaria bancrofti obtained 

 by Dr. M. W. Lyon from a former inhabitant of British Guiana, for 

 several years resident in the District of Columbia. 



M. W. Lyon, Jr., Recording Secretary. 



